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 TM 11-6625-3056-12
3-4.
ALARM TEST
General
To test the alarm circuit on the TD-1065 channel circuit card, proceed as follows:
Setup
Refer to paragraph 3-2.
Procedure
Set TS-3981 controls as follows:
POWER
ON
PATTERN
LONG
OPERATION
4W
CORRELATOR LOOP
OPEN
DATA ON/OFF
ON
RATE SELECT
7 (32 kb/s)
DISPLAY SELECT
ERRORS
ACTIVITY indicator will be lit.
Press RESET:
Display will read 0.
If display does not stay at 0 and increases count rapidly, turn DATA ON/OFF back and forth
between ON and OFF several times. If display still increases count rapidly, polarity of DATA
OUT and/or DATA IN connectors may be reversed. Reconnect with opposite polarity and
repeat procedure.
Press SINGLE ERROR several times.
Display will advance 1 count each time SINGLE ERROR is pressed. This ensures setup is
operating properly.
Set RATE SELECT to 0 (38.4 kb/s):
TD-1065 alarm indicator will light. Audible buzzer will sound. FAULT indicator on circuit card
for channel being tested will light (if test function control is set to CHAN).
If a remote alarm is connected to the TD-1065 it also will actuate.
3-5
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